Brake for vehicles



July 24, 1928. 1,678,227

G. vImca-nar:

BRAKE FOR VEHICLES led April 28. 1925 2 Sheets-Sheet 1 Juli 24;-1923. l

G. MCGHEE BRAKE FOR VEHICLES Filed April 28, 1925 2 sheets-sheet 2 UNITED- GEQGE- McGHaf ciiL romances, .Seemann maken@ VEHICLES.

v Application mea eprilfaa 1925. .SriafNe My 'invention relates` to improvements i and connected With brake-s Vfor vehicles,-` of the kind comprising" mechanism whereby' if the vehicle begins to run at a speed greater than the predetermined speed i. e., beyond the speed which the vehicle has been set to run at, the brakes will be automatically put into action. v

In carrying out the invention as applied for example to a bogie used in mines, quarries or the like, I provide one of the axles carry ing the bogie, car or vehicle with a cam. Immediately behind this axle there is a suitable bracket attachedto the .frame of the bogie on which there is carried a ulcrumr pin carrying a lever which is actuated by said cam. At the end of said lever there is suitably pivoted a weighted arm which, when the speed of the said cam exceeds a predetermined value, engages a member by which the brakes are applied. There is also a spindlewhich may extend thefwhole width of the bogie to which Vthe brake-blocks are suitably connected. The brake-blocks are provided with suitable springs for pressing the brake-blocks againstithe wheels when the brake is in action.

A suitable regulating arrangementfis providedfor predetermining the speed at which the bogie is desired to travel.

In order ,that my invention may be properly understood and readily carried into eiect, I have hereunto appended one sheet of drawings, of which:

*Figure 1 is a side elevation showing posi-` f tion when brake is oil.

`Figure 2 is a plan of Figure l. n Figure 8 is a side elevation showing position when brake is on.

Figure 4 is a diagrammatic side elevation with parts removed. n Referring to the drawings, A is one of the axlescarrying the bogie, car or vehicle E and provided with a cam C. D is the bracket which is behind the axle A and attached to the frame E of the bogie, the said bracket D carrying the lever F which is pivoted on a pin G mounted on the bracket D.` The lever F bears against the cam C by means of a roller H, a torsion spring I being provided for` engaging the lever with the. cam. J is the Weighted lever which is pivoted at J 2 to the other end of the lever F. The Weighted end of the lever J is enga-ged by a spring() secured at one end O1 to a boss on the lever F. The lever J is nor- 26.5.60; giuria creatinina nai 9,' ilsmggffy mally `held against an adjustable"brackets" PATFN Tp which forms fafstop on the leverfF by the",`

4flat spring O. A finger J4 oriningwpai'tvo-f f or attached to the `weighted lever J y is adapted to yengage with the lever N as hereinafter l described. The lever N is lixed tothe shaft K, which, as here shown, passes only through one sideof theframe E andis connected to the brake-block L.k lThe brake lblock L is carried by an arm L1 secured to the spindle K.

QM are the springs interposed between the arm L1 and the brake-block Lby which the block is pressed againstthe vwheels of thebogie when the brake is in operation.`

feo

When the bogie or other vehicleis at they normal or prearranged speed, the finger J1L in its `upward movement due to the lever F does not engage with the lever N, but when the speed of the bogie is increased, the

along with the arm S. lags behind and turns upon its ,pivot J 2 against the pressure of the spring O, thus rotating and causing the finger J1 toengage with the .lever N. This causes the spindle K to rotate, thereby pressing the brake block L against the wheel B and thus the brake is by the spring O, an adjusting screw P being provided to increase or decrease the pressure of the spring O on the lever J. The adjust` able bracket X is attachedto the lever F to prevent said lever fromfnioving upwardly too far,

is suitably fixed to the brake-blocks L so that the brake may be hand operated if, and when, desired. i

Claims:

l.A Brake for vehicles arranged to be applied automatically when the vehicle moves at greater than the determined speed and comprising a revoluble element, a kcam thereon, a lever having a Xed support andengaged and arrangedv tombe operated by the cam, a weighted lever pivoted to the free end of, the first named lever and havingy a the weighted lever J y that is to say to limit the extent of `movement of said lever.

A hand operated lever Q, 1s providedy and vweighted lever J in its upward movement nger.`v piece, afbrake block, and: a lever to earn,l a Weighted lever pvoted to the free operate said brake block, said lastnangedwend of the irst named lever and having a lever being engageable by said nger piece nger piece, a brake block, and a lever to n vvlnen the extent of movelne'nt*Offthey rstlfhoperatefsad brake block, said last named 15 5 lever by said cam is sufficient. y y V lever beingvengageable by said finger piece 2. Brake fOr-vehicles arranged 'tej be ap`- When'athe extent of movement of the first t plied auternatyally when the .vehicle moves' lever by said `cam is s uent, a spring bearat greater than the determined Speed andl ving against theweighted lever andfneans to comprisingarevoluble yelenentla earn there-v vary thetension of saidsprnggon sadflever. 20

` 10 on, lallfe'er having akfxed supportandjen-`14` 1n Witness whereof `I axmy signature.

' gagedaMnd-arranged t0 be operated bythe,4 Y a GEORGE MCGHEE. Q; 

